Financial Integration: A New Methodology and an Illustration
This paper develops a simple new methodology to test for asset integration and applies it within and between American stock markets. Our technique is tightly based on a general intertemporal asset-pricing model, and relies on estimating and comparing expected risk-free rates across assets. Expected risk-free rates are allowed to vary freely over time, constrained only by the fact that they are equal across (risk-adjusted) assets. Assets are allowed to have general risk characteristics, and are constrained only by a factor model of covariances over short time periods. The technique is undemanding in terms of both data and estimation. We find that expected risk-free rates vary dramatically over time, unlike short interest rates. Further, the S&P 500 market seems to be well integrated, and the NASDAQ is generally (but not always) integrated. However, the NASDAQ is poorly integrated with the S&P 500.
|Date of creation:||Aug 2003|
|Date of revision:|
|Publication status:||published as Robert P. Flood & Andrew K. Rose, 2005. "Financial Integration: A New Methodology And An Illustration," Journal of the European Economic Association, MIT Press, vol. 3(6), pages 1349-1359, December.|
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